Roger Williams University, commonly abbreviated as RWU, is a private, coeducational American liberal arts university located on 140 acres in Bristol, Rhode Island, on Mt. Hope Bay. Founded in 1956, it was named for theologian and Rhode Island cofounder Roger Williams. The university has no religious affiliation. Wikipedia.
Smolowitz R.,Roger Williams University
The eastern oyster, Crassostrea virginica (Gmelin), is both an important component of our estuaries and an important farmed food animal along the east and south coasts of the United States. Its populations have been significantly diminished in the wild due to decades of overfishing beginning in the 1890s. Unfortunately, in 1950, a new disease in eastern oysters caused by the protistan agent, Perkinsus marinus, was identified. The disease, resulting from infection with this protozoan, leads to high mortality of both wild and cultured eastern oysters. Current restoration efforts are hampered by the disease, as is the aquaculture of this economically important food. The parasite infects hemocytes and causes hemolytic anemia and general degeneration of the tissues, leading to death. Ongoing research efforts are attempting to develop oysters resistant to the disease. Transport regulations exist in may states. Infection with P. marinus is listed as a reportable disease by the World Health Organization. © The Author(s) 2013. Source
Li Y.,Roger Williams University
Journal of Manufacturing Technology Management
Purpose - The purpose of this paper is to examine a Chinese small enterprise's failed attempt to adopt enterprise resource planning (ERP) and to identify the critical success factors for these type of projects. Design/methodology/approach - Information was collected through multiple site visits and semi-structured interviews with key staff of the ERP project, as well as examination of relevant company documentations. Findings - The study identified nine critical success factors and discussed how these factors affected ERP adoption in a small farming feed manufacturing company. Originality/value - Considering very few ERP project failures are recorded in the literature and the majority of existing ERP research in China was in the context of large state-owned or foreign-invested companies, this paper represents an early effort to explore the reasons why ERP adoption failed in the case study company. It provides valuable lessons to Chinese small enterprises on some of the common pitfalls they may encounter when pursuing ERP. © Emerald Group Publishing Limited. Source
Kiorboe T.,Technical University of Denmark |
Jiang H.,Woods Hole Oceanographic Institution |
Colin S.P.,Roger Williams University
Proceedings of the Royal Society B: Biological Sciences
Zooplankton feed in any of three ways: they generate a feeding current while hovering, cruise through the water or are ambush feeders. Each mode generates different hydrodynamic disturbances and hence exposes the grazers differently to mechanosensory predators. Ambush feeders sink slowly and therefore perform occasional upward repositioning jumps. We quantified the fluid disturbance generated by repositioning jumps in a millimetre-sized copepod (Re ~ 40). The kick of the swimming legs generates a viscous vortex ring in the wake; another ring of similar intensity but opposite rotation is formed around the decelerating copepod. A simple analytical model, that of an impulsive point force, properly describes the observed flow field as a function of the momentum of the copepod, including the translation of the vortex and its spatial extension and temporal decay. We show that the time-averaged fluid signal and the consequent predation risk is much less for an ambush-feeding than a cruising or hovering copepod for small individuals, while the reverse is true for individuals larger than about 1 mm. This makes inefficient ambush feeding feasible in small copepods, and is consistent with the observation that ambush-feeding copepods in the ocean are all small, while larger species invariably use hovering or cruising feeding strategies. © 2010 The Royal Society. Source
Mann M.E.,Pennsylvania State University |
Fuentes J.D.,Pennsylvania State University |
Rutherford S.,Roger Williams University
The largest eruption of a tropical volcano during the past millennium occurred in AD 1258-1259. Its estimated radiative forcing was several times larger than the 1991 Pinatubo eruption 1. Radiative forcing of that magnitude is expected to result in a climate cooling of about 2 °C (refs 2-5). This effect, however, is largely absent from tree-ring reconstructions of temperature 6-8, and is muted in reconstructions that employ a mix of tree-rings and other proxy data 9,10. This discrepancy has called into question the climate impact of the eruption 2,5,11. Here we use a tree-growth model driven by simulated temperature variations to show that the discrepancy between expected and reconstructed temperatures is probably an artefact caused by a reduced sensitivity to cooling in trees that grow near the treeline. This effect is compounded by the secondary effects of chronological errors due to missing growth rings and volcanically induced alterations of diffuse light. We support this conclusion with an assessment of synthetic proxy records created using the simulated temperature variations. Our findings suggest that the evidence from tree rings is consistent with a substantial climate impact 2-5 of volcanic eruptions in past centuries that is greater than that estimated by tree-ring-based temperature reconstructions. © 2012 Macmillan Publishers Limited. All rights reserved. Source
Agency: NSF | Branch: Standard Grant | Program: | Phase: BIOLOGICAL OCEANOGRAPHY | Award Amount: 376.62K | Year: 2013
Viral-induced mortality of marine microorganisms alters the quantity and quality of pools of dissolved organic matter in the oceans, shuttling organic matter back into the microbial loop and away from the larger marine food web. A major hindrance to understanding the role of viruses in biogeochemical cycling is that we know surprisingly little about which viruses infect which bacteria in the marine environment. In this project, a network-based framework will be used to investigate marine phage-bacteria interactions in complex, multispecies communities. The research focuses on cyanophages, viruses that infect Synechococcus, an ecologically important cyanobacterium in the oceans. There are three parts of the project. The first part will identify genetic signatures of cyanophage-Synechococcus interactions by using laboratory evolution experiments and genomic sequencing. The second part will examine the temporal and spatial diversity of these candidate interaction genes in natural cyanophage populations, by comparing the full genome sequences of hundreds of isolates previously collected over many years. The third part will adapt the new method of viral-tagging to natural host populations to characterize cyanophage-Synechococcus interaction networks in the environment.
Intellectual Merit: The role of viruses in global marine biogeochemical cycles depends on viral-induced mortality rates, which have been estimated to vary widely. The pattern and dynamics of who infects whom are central to our understanding of these rates as well as the role viruses play in marine nutrient cycling. This project will also contribute generally to our knowledge about viral diversity. The vast majority of marine viral sequences are not similar to any known diversity, and it is reasonable to conclude that many of these genes have to do with host recognition and infection. Finally, this project will develop a method of characterizing phage-bacteria interactions in natural, diverse microbial communities, thereby opening avenues for similar studies of viruses in other environments.
Broader Impacts: The project will provide training for 15 undergraduate students (including students from the California Alliance for Minority Participation in Science, Engineering, and Mathematics), 2 graduate students and a postdoc. The project will also build on a science-education internship program that was developed with Crystal Cove State Park in California. The Park is host to more than 1.2 million visitors and 10,000 K-12 students each year. The outcome of this program will be topical science teaching kits that reside in the Marine Research Facility of the Park to be used by middle and high school teachers and students. These kits will connect marine microbiological research to the standards-based curricula of California and National Science Standards, educate the public on this NSF research and assist in the training of Science, Technology, Engineering, and Math (STEM) K-12 teachers. The results will be disseminated at national conferences, including American Educational Researchers Association (AERA) and National Association of Research on Science Teaching (NARST), while the curriculum and video productions will be hosted on the website of the UCI Center for Learning in the Arts Sciences and Sustainability.